JP3922588B2 - Molding method for synthetic resin molded products - Google Patents

Molding method for synthetic resin molded products Download PDF

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JP3922588B2
JP3922588B2 JP2005154944A JP2005154944A JP3922588B2 JP 3922588 B2 JP3922588 B2 JP 3922588B2 JP 2005154944 A JP2005154944 A JP 2005154944A JP 2005154944 A JP2005154944 A JP 2005154944A JP 3922588 B2 JP3922588 B2 JP 3922588B2
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synthetic resin
molding
lower mold
raw material
supply
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JP2006327061A (en
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鈴木　　啓介
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Naigai Kasei Co Ltd
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Naigai Kasei Co Ltd
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Priority to JP2005154944A priority Critical patent/JP3922588B2/en
Priority to TW095110063A priority patent/TW200642822A/en
Priority to CN2006100674156A priority patent/CN1868718B/en
Priority to KR1020060028896A priority patent/KR100749213B1/en
Priority to US11/440,635 priority patent/US8394304B2/en
Publication of JP2006327061A publication Critical patent/JP2006327061A/en
Priority to HK07102157.8A priority patent/HK1094882A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/04—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds
    • B29C43/06—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts
    • B29C43/08—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles using movable moulds continuously movable in one direction, e.g. mounted on chains, belts with circular movement, e.g. mounted on rolls, turntables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/041—Feeding of the material to be moulded, e.g. into a mould cavity using filling or dispensing heads placed in closed moulds or in contact with mould walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
    • B29C31/04—Feeding of the material to be moulded, e.g. into a mould cavity
    • B29C31/042—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • B29C31/048—Feeding of the material to be moulded, e.g. into a mould cavity using dispensing heads, e.g. extruders, placed over or apart from the moulds the material being severed at the dispensing head exit, e.g. as ring, drop or gob, and transported immediately into the mould, e.g. by gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • B29C43/40—Moulds for making articles of definite length, i.e. discrete articles with means for cutting the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3433—Feeding the material to the mould or the compression means using dispensing heads, e.g. extruders, placed over or apart from the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3444—Feeding the material to the mould or the compression means using pressurising feeding means located in the mould, e.g. plungers or pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Robotics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Description

本発明は、各種合成樹脂成形品の成形方法に関する。特に、医療分野において、輸液容器、採血管等の医療用容器或いはそれらの医療用キャップにおける針刺し可能な栓体として好適に用いられる熱可塑性エラストマー樹脂成形品の成形方法に関する。   The present invention relates to a method for molding various synthetic resin molded products. In particular, the present invention relates to a method for molding a thermoplastic elastomer resin molded article that is suitably used as a medical needle such as an infusion container, a blood collection tube, or a medical cap in the medical field.

従来、合成樹脂原料を用いて成形する方法として、型内に投入された樹脂原料に圧力をかけて成形するコンプレッション成形方法が提供されている（特許文献１）。
特開２００３−２７５２７８号公報 Conventionally, as a method of molding using a synthetic resin raw material, there is provided a compression molding method of molding by applying pressure to a resin raw material put into a mold (Patent Document 1).
JP 2003-275278 A

しかし、上記コンプレッション成形は、一般的に用いられる射出成形とは異なり、樹脂原料の塊を型内において圧力をかけて成形するため、射出成形のように型内に充填しながら加圧し、計量と成形が同時に行われるもではない。従って、コンプレッション成形は、成形工程中に樹脂の補充ができず、また当該樹脂原料の容積乃至形状が当該型内において変化する。従って、投入する樹脂原料が多すぎるとバリが発生しやすく、少なすぎると所定の成形品が得られず成形不良となる。従って、下型と上型からなる型内に原料投入の方法乃至投入条件をどのようにするかは、コンプレッション成形法における重要な課題である。特に、注射針等の針刺しを行なう輸液用栓体の場合、単なるプレス成形の如きコンプレッション成形で得られるパッキンなどの薄肉成形品とは異なり、使用時に上下逆に設置された輸液容器の口部に装備され、この状態において刺された針を保持しつつ容器内の輸液の液漏れがしないようにする必要があることから、肉厚があって全体が均質な単体成形品を得なければならない。
この点、従来のこの種の成形方法では、好ましい型内への原料の供給方法乃至供給条件について必ずしも十分な技術が開示されておらず、特に連続成形方法として全体が均質な肉厚成形品をコンプレッション成形で成形する方法については開示がない。 However, the compression molding is different from the generally used injection molding in that a mass of resin raw material is molded by applying pressure in the mold. Molding is not done at the same time. Therefore, in compression molding, resin cannot be replenished during the molding process, and the volume or shape of the resin raw material changes in the mold. Therefore, if too much resin raw material is added, burrs are likely to occur, and if it is too small, a predetermined molded product cannot be obtained, resulting in molding failure. Therefore, how to put the raw material in the mold composed of the lower mold and the upper mold or how to make the input conditions is an important problem in the compression molding method. In particular, in the case of an infusion stopper that performs needle puncture of an injection needle or the like, unlike a thin molded product such as packing obtained by compression molding such as mere press molding, the mouth of an infusion container installed upside down at the time of use is used. Since it is necessary to prevent leakage of the infusion solution in the container while holding the needle that is equipped and stabbed in this state, it is necessary to obtain a single-piece product that is thick and homogeneous throughout.
In this regard, the conventional molding method of this type does not necessarily disclose a sufficient technique for the preferable raw material supply method or supply conditions in the mold, and in particular, as a continuous molding method, a thick molded product having a uniform overall shape is used. There is no disclosure about a method of molding by compression molding.

本発明の課題は、上記問題点を解決しようとするのであり、コンプレッション成形方法において、肉厚があって全体が均質な合成樹脂成形品を連続的に得ることが出来る合成樹脂成形品の成形方法を提供するところにある。   An object of the present invention is to solve the above-mentioned problems, and in the compression molding method, a synthetic resin molded product molding method capable of continuously obtaining a synthetic resin molded product having a large thickness and uniform throughout. Is to provide.

本発明は、供給路に含まれる溶融された樹脂原料から引き千切られた樹脂塊を用いることで、投入原料を一定量或は一定形状に保つ手段を採用することで上記課題を解決した。 The present invention solves the above-mentioned problems by adopting a means for keeping the input raw material in a constant amount or a constant shape by using a lump of resin that is chopped from the molten resin raw material contained in the supply path .

本請求項１の発明は、供給路から溶融された合成樹脂原料が金型内に所定量充填された後、前記供給路に含まれる溶融された合成樹脂原料の供給途中を引き伸ばし、その引き伸ばした部分を引き千切り、その引き千切られた樹脂塊を成形する合成樹脂成形品の成形方法である。 According to the first aspect of the present invention, after a predetermined amount of the synthetic resin raw material melted from the supply passage is filled in the mold, the supply of the molten synthetic resin raw material contained in the supply passage is stretched and stretched. This is a method for molding a synthetic resin molded product, in which a portion is shredded and the shredded resin mass is molded.

本請求項２の発明は、供給路から溶融された合成樹脂原料が金型内に所定量充填された後、前記供給路に含まれる前記溶融された合成樹脂原料の供給先の端部を、その内部が溶融状態を保持しつつ外側若しくは表面が固化する過程において引っ張り、前記溶融された合成樹脂原料の供給途中を引き伸ばし、その引き伸ばした部分を引き千切り、その引き千切られた樹脂塊を成形する合成樹脂成形品の成形方法である。 According to the present invention of claim 2 , after a predetermined amount of the synthetic resin raw material melted from the supply path is filled in the mold, the end of the supply destination of the molten synthetic resin raw material contained in the supply path is Pulling in the process of solidifying the outside or the surface while maintaining the inside in a molten state, stretching the supply of the molten synthetic resin raw material, chopping the stretched portion, and molding the chopped resin lump This is a method for molding a synthetic resin molded product.

本請求項３の発明は、溶融された合成樹脂原料を、供給路を通じて下型の型内に供給し、当該下型への供給路においてその供給路に含まれる当該合成樹脂原料を所定量の成形用樹脂塊となる部位にて引き千切り、この引き千切られて前記下型に盛り残された成形用樹脂塊を、成形用上型により圧潰しながら成形することを特徴とする合成樹脂成形品の成形方法である。 The invention of this third aspect, a molten synthetic resin material is supplied into the mold of the lower mold through the supply passage, the synthetic resin material contained in the supply path in the supply path to the lower mold of a predetermined amount A synthetic resin molded product characterized by forming the resin mass for molding that has been shredded at the portion that becomes the resin mass for molding, and clogged with the upper mold for molding, the resin mass for molding remaining in the lower mold. This is a molding method.

本請求項４の発明は、前記供給路が前記合成樹脂原料の供給用上型に備えられており、溶融された合成樹脂原料をこの供給用上型の供給路を通じて下型の型内に供給して、この供給用上型と下型とにより構成された型内空洞部に前記合成樹脂を充填した後、前記供給路においてその供給路に含まれる当該合成樹脂原料を所定量の成形用樹脂塊となる部位にて引き千切り、この引き千切られて前記下型に盛り残された成形用樹脂塊を、成形用上型により圧潰して成形する請求項３記載の合成樹脂成形品の成形方法である。 In the invention of claim 4, the supply path is provided in the upper mold for supplying the synthetic resin raw material, and the molten synthetic resin raw material is supplied into the lower mold through the supply path of the upper mold for supply. Then, after the synthetic resin is filled in the mold cavity constituted by the supply upper mold and the lower mold, the synthetic resin raw material contained in the supply path in the supply path is supplied with a predetermined amount of molding resin. 4. The method for molding a synthetic resin molded product according to claim 3 , wherein the molding resin lump that has been shredded at a portion to be a lump and crushed and left in the lower mold is crushed by an upper mold for molding. It is.

本請求項５の発明は、前記合成樹脂原料が、オレフィン系樹脂原料である請求項１乃至４のいずれかの項に記載の合成樹脂成形品の成形方法である。
また本請求項６の発明は、前記合成樹脂原料が熱可塑性エラストマー樹脂原料である請求項１乃至４のいずれかの項に記載の合成樹脂成形品の成形方法である。 The invention according to claim 5 is the method for molding a synthetic resin molded article according to any one of claims 1 to 4 , wherein the synthetic resin raw material is an olefin resin raw material.
The invention of claim 6 is the method for molding a synthetic resin molded article according to any one of claims 1 to 4 , wherein the synthetic resin material is a thermoplastic elastomer resin material.

本請求項７の発明は、前記引き千切りが、前記下型を前記供給路から離反移動させてなされる請求項３乃至６のいずれかの項に記載の合成樹脂成形品の成形方法である。 The invention of claim 7 is the method for molding a synthetic resin molded product according to any one of claims 3 to 6 , wherein the pulling and cutting is performed by moving the lower mold away from the supply path.

本請求項８の発明は、前記供給路が、前記合成樹脂原料の融点以上に設定され、下型が前記合成樹脂原料の融点未満に設定されている請求項１乃至４のいずれかの項に記載の合成樹脂成形品の成形方法である。 The invention of this claim 8, wherein the supply path, the synthetic resin material is set above the melting point of any of claims 1 to 4 the lower mold is set to less than the melting point of the synthetic resin raw material It is a molding method of the described synthetic resin molded product.

本請求項９の発明は、前記供給路が前記合成樹脂原料の融点より１０℃〜２０℃高い温度に設定され、下型が１０〜８０℃に設定されている請求項８記載の合成樹脂成形品の成形方法である。 The invention of this claim 9, wherein the supply channel is set to the synthetic resin raw material has a high 10 ° C. to 20 ° C. than the melting point temperature, the synthetic resin according to claim 8, wherein the lower mold is set to 10 to 80 ° C. This is a molding method of a molded product.

本請求項１０の発明は、前記供給用上型が、前記合成樹脂原料の送給用ノズルの先端部にて構成され且つ下型を閉型する上型本体部を備えており、当該上型本体部の内部に、当該送給用ノズル主部の送給路から連続する下型への供給路を備えた請求項４記載の合成樹脂成形品の成形方法である。 The invention of this claim 1 0, wherein the supply upper die comprises upper mold body portion closed the configured and lower die at the tip portion of the sheet nozzle feeding of the synthetic resin material, the on 5. The method for molding a synthetic resin molded product according to claim 4, further comprising a supply path from the feed path of the feed nozzle main part to a continuous lower mold inside the mold body.

本請求項１１の発明は、前記供給用上型が、前記合成樹脂原料の送給用ノズルの先端部に対して可動式に分割されており、当該先端部に対して上下スライド可能に内装される摺動部と、この摺動部に連続して下型を閉型する上型本体部とを備えており、当該摺動部と本体部の内部に前記送給用ノズル主部の送給路につながる下型への供給路が構成されている請求項４記載の合成樹脂成形品の成形方法である。 The invention of this claim 1 1, wherein the supply for the upper mold is divided into a movable relative to the tip portion of the sheet nozzle feeding of the synthetic resin raw material, vertically slidably furnished with respect to the distal portion a sliding portion which is provided with an upper die body portion closed the lower mold continuously to the sliding portion, the sliding portion and the body portion inside of the in-feed of the sheet for nozzle main portion of The method for molding a synthetic resin molded product according to claim 4, wherein a supply path to the lower mold connected to the feeding path is configured.

本請求項１２の発明は、前記下型への供給路が、前記送給用ノズル主部の送給路につながる第１供給路と、この第１供給路に連続して下型の開口部側に向かって漸次その断面積が拡大する第２供給路を有する請求項１０又は１１記載の合成樹脂成形品の成形方法である。 Invention of the present claim 1 2, the supply path to the lower mold, and the first supply path leading to the sheet path feeding of the feeding nozzle main unit, the opening of the lower mold continuously to the first supply path toward the parts side is gradually claim 1 0 or 1 1 molding method of a synthetic resin molded article according to a second supply passage sectional area is expanded.

本請求項１３の発明は、溶融された合成樹脂原料の送給用ノズルの先端部を構成し且つ下型を閉型する上型本体部を備えており、当該上型本体部の内部に、当該送給用ノズル主部の送給路から連続する下型への供給路を備えた供給用上型であって、
この供給用上型に対して下型を押し当てながら閉型し、溶融された合成樹脂原料を供給用上型の前記供給路を通じて下型の型内に供給して、この供給用上型と下型とにより閉型されて構成された型内空洞部に前記合成樹脂を充填し、
その後、下型を押し下げ、前記供給路に含まれる当該合成樹脂原料を引き伸ばし、所定量の成形用樹脂塊となる部位にて引き千切り、
この引き千切られた成形用樹脂塊が盛り残された下型を、成形用上型に押し上げて閉型し、圧潰して成形することを特徴とする請求項１０記載の合成樹脂成形品の成形方法である。 The invention of this claim 1 3, provided with a upper mold body portion closed configured and lower mold to the leading end of the sheet nozzle feeding of molten synthetic resin material, the inside of the upper mold body portion , An upper mold for supply comprising a supply path from the feed path of the main part of the feed nozzle to a continuous lower mold,
Close the mold while pressing the lower mold against the upper mold for supply, and supply the molten synthetic resin raw material into the lower mold through the supply path of the upper mold for supply. Filling the cavity inside the mold that is closed by the lower mold with the synthetic resin,
Thereafter, the lower mold is pushed down, the synthetic resin raw material contained in the supply path is stretched, and is shredded at a site that becomes a predetermined amount of molding resin lump,
The torn off was lower mold molding resin mass was left prime was, pushes the upper mold for molding closed, according to claim 1 0, wherein the synthetic resin molded article, which comprises molding crushed This is a molding method.

本請求項１４の発明は、前記下型が、当該下型の型内空洞部に連通する摺動孔とこの摺動孔内を摺接可動するピンを備えた下型であって、
前記下型の押し下げに同期して前記ピンを引き下げ、盛り残すべき原料樹脂と下型の間に生じた負圧により前記原料樹脂を保持しながら、前記供給路に含まれる当該合成樹脂原料を引き伸ばし、所定量の成形用樹脂塊となる部位にて引き千切る請求項１３記載の合成樹脂成形品の成形方法である。 Invention of the present claims 1 to 4, the lower mold, a lower mold having a pin for sliding movable the sliding bore and sliding hole communicating with the mold cavity of the lower mold,
The pin is pulled down in synchronization with the lower mold being pushed down, and the synthetic resin material contained in the supply path is stretched while holding the raw material resin by the negative pressure generated between the raw material resin to be left and the lower mold. a molding method according to claim 1 3, wherein the synthetic resin molded article cut torn at the site to be molding resin mass of a predetermined amount.

本請求項１５の発明は、溶融された合成樹脂原料の送給用ノズルに対して上下スライド可能に取り付けられ、前記送給用ノズル主部の送給路につながる下型への供給路を備えた合成樹脂原料の供給用上型であって、
この供給用上型に対して下型を押し当てながら前記送給用ノズルに供給用上型をスライドさせながら押し上げて閉型し、溶融された合成樹脂原料を供給用上型の前記供給路から下型の型内に供給して、この供給用上型と下型とにより閉型されて構成された型内空洞部に前記合成樹脂を充填し、
その後、下型を押し下げ、これに追随して供給用上型を送給用ノズルからスライド降下させることにより、この供給路に含まれる当該合成樹脂原料を引き伸ばし、所定量の成形用樹脂塊となる部位にて引き千切り、
この引き千切られた成形用樹脂塊が盛り残された下型を、成形用上型に押し上げて閉型し、圧潰して成形することを特徴とする請求項１１記載の合成樹脂成形品の成形方法である。 Invention of the present claim 1 5, mounted for vertical slide against sheet nozzle feeding of molten synthetic resin material, the supply path to the lower die connected to the paper path feed of the feeding for Nozzle main unit An upper mold for supplying a synthetic resin raw material comprising:
While pressing the lower mold against the upper mold for supply, the upper mold for supply is pushed up and closed while sliding on the feeding nozzle, and the molten synthetic resin raw material is removed from the supply path of the upper mold for supply. Supplying into the lower mold, filling the synthetic resin into the mold cavity that is closed by the upper mold and lower mold for supply,
Thereafter, the lower mold is pushed down, and the upper mold for supply is slid down from the feed nozzle by following this, so that the synthetic resin raw material contained in this supply path is stretched to form a predetermined amount of molding resin lump. Shred at the site,
The torn off was lower mold molding resin mass was left prime was, pushes the upper mold for molding closed, according to claim 1 1, wherein the synthetic resin molded article, which comprises molding crushed This is a molding method.

本請求項１６の発明は、前記合成樹脂成形品が医療用栓体である請求項１〜１５のいずれかの項に記載の合成樹脂成形品の成形方法である。 The invention of claim 16 is the method for molding a synthetic resin molded article according to any one of claims 1 to 15 , wherein the synthetic resin molded article is a medical plug.

本発明によれば、溶融された合成樹脂原料の供給途中を切断して計量しており、その切断による計量によって例えば下型内に盛り残された樹脂塊を成形する合成樹脂成形品の成形方法であることから、溶融された樹脂原料の投入を一定量と一定形状に維持して行うことができるので、コンプレッション成形方法において、肉厚成形品であっても全体が均質な合成樹脂成形品を連続的に得ることが出来る。   According to the present invention, a method for molding a synthetic resin molded product is obtained by cutting and weighing the supply of molten synthetic resin raw material, and molding, for example, a resin lump remaining in the lower mold by measurement by the cutting Therefore, the molten resin raw material can be charged while maintaining a constant amount and a constant shape, so that in the compression molding method, a synthetic resin molded product that is homogeneous throughout even if it is a thick molded product. Can be obtained continuously.

特に、溶融された合成樹脂原料の供給途中を引き伸ばし、その引き伸ばした部分を引き千切り、その引き千切られた樹脂塊を成形する成形方法は、引き伸ばした部分を引き千切る過程の中で樹脂原料の計量が行なうことができ、またその後に上型によって成形される形状に近い樹脂原料の形状として引き千切られた樹脂塊を得ることができるため、当該型内における樹脂原料の容積及び形状の変化を極力抑えることができ、最終成形品を想定した必要最低限度の樹脂量において所定形状の均質な肉厚成形品を連続的に容易に成形することができる。   In particular, the molding method in which the melted synthetic resin raw material is stretched in the middle of supply, the stretched portion is shredded, and the shredded resin lump is molded is a process of shredding the stretched portion of the resin raw material. Since weighing can be performed and a resin lump that has been shredded as the shape of the resin material close to the shape formed by the upper mold can be obtained, the volume and shape of the resin material in the mold can be changed. It can be suppressed as much as possible, and a uniform thick molded product having a predetermined shape can be continuously and easily molded with a minimum amount of resin assuming the final molded product.

以下、本発明の一実施形態として、熱可塑性合成樹脂エラストマーからなる医療用栓体の成形方法を例にとり説明する。なお、本発明は下記に限定されるものではない。   Hereinafter, as an embodiment of the present invention, a method for forming a medical plug made of a thermoplastic synthetic resin elastomer will be described as an example. The present invention is not limited to the following.

本発明の成形法では、樹脂原料を加熱する加熱工程と、前記加熱された樹脂原料を計量して型内の空洞部に導入する原料計量工程と、導入した前記樹脂原料に圧力を与えて栓体形状に圧潰して成形（整形）する圧潰工程（成形工程）とを少なくとも備える成形法である。この一連の工程を本明細書では本発明におけるコンプレッション成形法と称する。   In the molding method of the present invention, a heating step of heating a resin raw material, a raw material measurement step of measuring the heated resin raw material and introducing it into a cavity in a mold, and applying pressure to the introduced resin raw material to plug It is a shaping | molding method provided with the crushing process (molding process) which crushes to a body shape and shape | molds (shaping). This series of steps is referred to herein as a compression molding method in the present invention.

図１は本発明の方法を実施するためのコンプレッション成形装置の一例を示す概略平面図、図２は図１における概略側図である。図１及び図２において、１００は押し出し機、２００は成形機である。１０１は樹脂原料を押出し機１００に投入するホッパー、１０２は押出し機１００内で加熱され押出された溶融状態の樹脂原料を押出し機１００から成形機２００に送給する送給用ノズルである。   FIG. 1 is a schematic plan view showing an example of a compression molding apparatus for carrying out the method of the present invention, and FIG. 2 is a schematic side view of FIG. 1 and 2, 100 is an extruder, and 200 is a molding machine. Reference numeral 101 denotes a hopper that feeds the resin material into the extruder 100, and reference numeral 102 denotes a feeding nozzle that feeds the molten resin material heated and extruded in the extruder 100 from the extruder 100 to the molding machine 200.

成形機２００は、図１及び図２に示す様に、右回り（図１の矢印方向）に断続的に回転する成形テーブル２０１を備えている。成形テーブル２０１には、前記送給用ノズル１０２から供給される溶融状態の樹脂原料を計量する計量ステーション２０２と、この計量ステーション２０２で計量された樹脂原料を圧潰して成形（整形）する圧潰ステーション２０３と、圧潰ステーション２０３で成形された成形品を冷却する冷却ステーション２０４と、冷却ステーション２０４で冷却された成形品を取り出す取出ステーション２０５を備えている。なお、２１０、２１１、２１２、２１３は成形テーブル２０１の四方に設置された下型であり、１０３は送給用ノズル１０２の先端部に設けられた樹脂原料の供給用上型、１０４は成形用上型である。   As shown in FIGS. 1 and 2, the molding machine 200 includes a molding table 201 that rotates intermittently clockwise (in the direction of the arrow in FIG. 1). The molding table 201 includes a measuring station 202 that measures the molten resin material supplied from the feeding nozzle 102 and a crushing station that compresses and molds (shapes) the resin material measured by the measuring station 202. 203, a cooling station 204 that cools the molded product molded in the crushing station 203, and a take-out station 205 that takes out the molded product cooled in the cooling station 204. In addition, 210, 211, 212, and 213 are lower molds installed on the four sides of the molding table 201, 103 is an upper mold for supplying a resin material provided at the tip of the feeding nozzle 102, and 104 is for molding. It is an upper mold.

従って、この成形装置によれば、押出し機１００で押出された溶融状態の樹脂原料が送給用ノズル１０２から計量ステーション２０２に供給され、供給用上型１０３と下型２１０とにより計量される。計量され下型２１０に盛られた樹脂原料は、この下型２１０と共に回転し、圧潰ステーション２０３の下型２１１の位置に移動した後、回転した下型２１０と成形用上型１０４とによって樹脂原料は圧潰されて成形（整形）される。かかる成形後、樹脂原料はさらに下型２１０と共に冷却ステーション２０４の下型２１２の位置に回転移動した後、冷却され、この冷却された樹脂原料はさらに下型２１０と共に取出しステーション２０５に回転移動して取り出される。   Therefore, according to this molding apparatus, the molten resin material extruded by the extruder 100 is supplied from the feed nozzle 102 to the measuring station 202 and is measured by the supply upper mold 103 and the lower mold 210. The resin raw material weighed and accumulated in the lower mold 210 rotates together with the lower mold 210 and moves to the position of the lower mold 211 of the crushing station 203, and then the resin raw material is rotated by the rotated lower mold 210 and the upper mold 104 for molding. Is crushed and shaped (shaped). After such molding, the resin raw material is further rotated together with the lower mold 210 to the position of the lower mold 212 of the cooling station 204 and then cooled. The cooled resin raw material is further rotated together with the lower mold 210 to the take-out station 205. It is taken out.

（計量工程の実施例１）
本実施形態では、前記計量ステーション２０２における計量工程に格別特徴がある。図３−１〜図３−５はそれぞれ本実施形態における計量工程の過程を順次示す樹脂原料の送給用ノズル１０２と下型２１０との概略断面図である。図３−１は開始、図３−２は型閉、図３−３は樹脂の充填、図３−４は引き千切り開始、図３−５は計量完了を示している。 (Example 1 of the metering process)
In the present embodiment, the weighing process in the weighing station 202 has a special feature. FIGS. 3-1 to 3-5 are schematic cross-sectional views of the resin raw material supply nozzle 102 and the lower mold 210, which sequentially show the process of the metering step in the present embodiment. Fig. 3-1 shows the start, Fig. 3-2 shows the mold closing, Fig. 3-3 shows the resin filling, Fig. 3-4 shows the start of the shredding, and Fig. 3-5 shows the completion of the measurement.

図３−１〜図３−５において、この実施形態では、送給用ノズル１０２の先端部１０２１に供給用上型１０３が設けられている。すなわち、図に示すとおり、供給用上型１０３は、溶融された合成樹脂原料の送給用ノズルの先端部を構成している。また、供給用上型１０３は、下型２１０を閉型する上型本体部１０３１を備えている。上型本体部１０３１の内部には、当該送給用ノズル１０２の主部１０２２における送給路１０２３から連続してつながった下型への供給路１０３２が形成されている。また供給路１０３２は、前記送給用ノズル主部１０２１の送給路１０２３につながる第１供給路１０３２ａと、この第１供給路１０３２ａに連続して下型の開口部２１０１側に向かって漸次その断面積が拡大する第２供給路１０３２ｂを有している。Ｒは溶融された樹脂原料である。Ｙは送給用ノズル１０２、供給用上型１０３、下型２１０の中心軸を結ぶ仮想軸である。
なお、本実施形態では、供給路１０３２が断面積が拡大する第２供給路１０３２ｂを有しているが、断面積が拡大しない第１供給路１０３２ａだけで構成することも勿論可能である。 3-1 to 3-5, in this embodiment, a supply upper mold 103 is provided at the tip 1021 of the supply nozzle 102. That is, as shown in the drawing, the upper mold 103 for supply constitutes the tip of the nozzle for feeding the molten synthetic resin material. The supply upper mold 103 includes an upper mold main body 1031 that closes the lower mold 210. A supply path 1032 to the lower mold that is continuously connected from the supply path 1023 in the main portion 1022 of the supply nozzle 102 is formed inside the upper mold main body section 1031. The supply path 1032 includes a first supply path 1032a connected to the supply path 1023 of the supply nozzle main portion 1021, and the first supply path 1032a continuously toward the lower mold opening 2101 side. The second supply path 1032b has an enlarged cross-sectional area. R is a molten resin raw material. Y is an imaginary axis connecting the central axes of the feeding nozzle 102, the upper mold 103 for supply, and the lower mold 210.
In this embodiment, the supply path 1032 has the second supply path 1032b whose cross-sectional area expands, but it is of course possible to configure only the first supply path 1032a whose cross-sectional area does not increase.

従って、溶融された樹脂原料Ｒを計量するにあたっては、図３−１（開始）に示すように、送給用ノズルの主部１０２２の送給路１０２３からその先端部１０２１の供給路１０３２に送られてくる溶融状態の樹脂原料Ｒを含んだ供給用上型１０３の接面１０３３に対して、図３−２（型閉）に示すように、下型２１０の接面２１０２を押し当てながら閉型する。なお、図３−２において、ＣＴ１は供給用上型１０３と下型２１０とにより閉型されて構成された型内空洞部である。   Therefore, when the molten resin raw material R is weighed, as shown in FIG. 3A (start), as shown in FIG. 3-1 (start), it is sent from the supply path 1023 of the main part 1022 of the supply nozzle to the supply path 1032 of the tip part 1021. As shown in FIG. 3-2 (mold closing), the contact surface 2102 of the lower mold 210 is closed against the contact surface 1033 of the upper mold 103 for supply containing the molten resin raw material R. Type. In FIG. 3B, CT <b> 1 is an in-mold cavity formed by being closed by the upper mold 103 for supply and the lower mold 210.

次に、図３−３（樹脂の充填）に示すように、押出し機１００から送給用ノズル１０２を通じて送給された溶融状態の樹脂原料Ｒを、前記供給用上型１０３の供給路１０３２を通じて下型２１０の型内の開口部２１０１に溶融状態において供給する。これにより、図３−３（樹脂の充填）に示すように、前記溶融された樹脂原料Ｒが、供給路１０３２と下型の型内空洞部２１０１とで形成された型内空洞部ＣＴ１に充填される。   Next, as shown in FIG. 3-3 (filling of resin), the molten resin raw material R fed from the extruder 100 through the feeding nozzle 102 passes through the supply path 1032 of the upper mold 103 for supply. The molten metal is supplied to the opening 2101 in the lower mold 210 in a molten state. As a result, as shown in FIG. 3-3 (filling of resin), the molten resin raw material R fills the mold cavity portion CT1 formed by the supply path 1032 and the lower mold cavity portion 2101. Is done.

その後、図３−４（引き千切り開始）に示すように、下型２１０を押し下げ、前記供給路１０３２に含まれる当該合成樹脂原料Ｒを引き伸ばし、図３−４に示すように、所定量の成形用樹脂塊ＲＸとなる部位Ｘにて引き千切り、図３−５（計量完了）に示すように、成形用樹脂塊ＲＸを得る。   Thereafter, as shown in FIG. 3-4 (starting of shredding), the lower mold 210 is pushed down, the synthetic resin raw material R contained in the supply path 1032 is stretched, and a predetermined amount of molding is performed as shown in FIG. 3-4. As shown in FIG. 3-5 (completion of measurement), a molding resin lump RX is obtained.

ところで本実施形態では、前記溶融された合成樹脂原料Ｒの供給先の端部を引っ張るタイミングとして、その端部の内部が溶融状態を保持しつつ外側若しくは表面が固化する過程において引っ張るようにしている。具体的には、下型２１０の開口部２１０１の内壁面の温度を、その開口部２１０１に充填される樹脂原料の融点未満の温度であって、その開口部２１０１に充填された樹脂原料の内部が溶融状態を保持しつつ外側若しくは表面が固化するように調整して、その固化する過程において引っ張るようにしている。
従って、下型２１０の開口部２１０１に充填された樹脂原料はその外側若しくは表面が固化過程にある一方で、供給用上型１０３１の供給路１０３２に含まれる樹脂原料は、下型２１０の開口部２１０１に含まれる樹脂原料と比較して溶融状態又は溶融状態に近い状態にある。因って、開口部２１０１に含まれる樹脂原料と供給路１０３２に含まれる樹脂原料とが相互に異なる相状態にあるため、供給用上型１０３１に対する下型２１０の下降がそのまま供給路１０３２に含まれる樹脂原料を引き伸す状態として実現し、更に下型２１０を下降させることによってその引き伸ばした部分が引き千切られることになる。 By the way, in the present embodiment, as the timing for pulling the end portion of the melted synthetic resin raw material R, the inside of the end portion is pulled in the process of solidifying the outside or the surface while maintaining the molten state. . Specifically, the temperature of the inner wall surface of the opening 2101 of the lower mold 210 is a temperature lower than the melting point of the resin raw material filled in the opening 2101 and the inside of the resin raw material filled in the opening 2101 Is adjusted so that the outside or surface is solidified while maintaining a molten state, and is pulled in the solidification process.
Therefore, the resin raw material filled in the opening 2101 of the lower mold 210 is solidified on the outside or the surface, while the resin raw material contained in the supply path 1032 of the upper mold 1031 for supply is the opening of the lower mold 210. Compared with the resin raw material included in 2101, it is in a molten state or a state close to a molten state. Therefore, since the resin raw material contained in the opening 2101 and the resin raw material contained in the supply path 1032 are in different phases, the lowering of the lower mold 210 relative to the upper mold 1031 for supply is included in the supply path 1032 as it is. The resin raw material to be stretched is realized, and the lower mold 210 is further lowered so that the stretched portion is shredded.

このようなことから、供給用上型１０３１の供給路１０３２は、前記合成樹脂原料の融点以上に設定されることが好ましく、下型２１０、特にその開口部２１０１の内壁面を前記合成樹脂原料の融点未満に設定することが好ましい。本発明において特に限定されるものではないが、例えば前記供給路が前記合成樹脂原料の融点より１０℃〜２０℃より高い温度に設定され、下型が１０〜８０℃の範囲内に設定されていることが好ましい。   For this reason, the supply path 1032 of the supply upper mold 1031 is preferably set to be equal to or higher than the melting point of the synthetic resin raw material, and the inner wall surface of the lower mold 210, particularly the opening 2101 thereof, is made of the synthetic resin raw material. It is preferable to set it below the melting point. Although not particularly limited in the present invention, for example, the supply path is set to a temperature higher than the melting point of the synthetic resin raw material by 10 ° C to 20 ° C, and the lower mold is set to a range of 10 to 80 ° C. Preferably it is.

なお、前記実施形態では、供給用上型１０３１に対して下型２１０を上下動させて、引き千切りを前記下型２１０を前記供給路１０３２から離反移動させる構成としているが、下型２１０に対して供給用上型１０３１が上下動するようにしても差し支えない。   In the embodiment, the lower mold 210 is moved up and down with respect to the upper mold 1031 for supply, and the pulling and cutting is configured to move the lower mold 210 away from the supply path 1032. Thus, the upper mold 1031 for supply may be moved up and down.

また、本実施形態では、前記下型への供給路１０３２は、前記送給用ノズル主部１０２２の送給路１０２３につながる第１供給路１０３２ａのみならず、この第１供給路１０３２ａに連続して下型の開口部２１０１側に向かって漸次その断面積が拡大する第２供給路１０３２ｂを設けることにより、図３−３及び図３−４に示すように、樹脂原料の引き伸ばし及び引き千切りを容易にし、また下型２１０の開口部２１０１に盛り残される樹脂原料塊ＲＸの形状の調整をし易くする上で好ましいが、格別第２供給路１０３２ｂを設けずとも第１供給路１０３２ａが連続する供給路１０３２として構成することも可能である。   Further, in the present embodiment, the supply path 1032 to the lower mold is continuous with the first supply path 1032a as well as the first supply path 1032a connected to the feed path 1023 of the feed nozzle main portion 1022. By providing the second supply passage 1032b whose sectional area gradually increases toward the lower mold opening 2101 side, as shown in FIGS. 3-3 and 3-4, the resin raw material is stretched and shredded. Although it is preferable for facilitating the adjustment of the shape of the resin raw material block RX remaining in the opening 2101 of the lower mold 210, the first supply path 1032a is continuous without providing the special second supply path 1032b. It is also possible to configure as the supply path 1032.

（圧潰工程（成形工程））
次に、図４−１に示すように、計量され下型２１０の開口部２１０１に盛り残された樹脂原料ＲＸは、成形テーブル２０１と共に回転する下型２１０の回転移動に伴って、圧潰ステーション２０３に移動する。なお、この圧潰ステーション２０３において、本実施形態の成形用上型１０４は管状体で構成され、この成形用上型１０４内の軸方向に成形ピン１０４１が内装されており、上下にスライドする構成となっている。そして、圧潰工程の初期では、この成形用上型１０４は、図４−１及び図４−２に示すように、下型２１０の開口部２１０１から盛り残されて上側に飛び出た樹脂原料ＲＸを取り込む空間Ｓ１を保持した状態にある。 (Crushing process (molding process))
Next, as shown in FIG. 4A, the resin raw material RX that is weighed and left in the opening 2101 of the lower mold 210 is crushed along with the rotational movement of the lower mold 210 that rotates together with the molding table 201. Move to. In the crushing station 203, the molding upper mold 104 of the present embodiment is formed of a tubular body, and a molding pin 1041 is provided in the axial direction in the molding upper mold 104 so as to slide up and down. It has become. Then, in the initial stage of the crushing process, the upper mold 104 is made of resin raw material RX that has been left uncovered from the opening 2101 of the lower mold 210 and jumped upward as shown in FIGS. 4A and 4B. The space S1 to be captured is held.

従って、図４−２に示すように、この引き千切られた成形用樹脂塊ＲＸが盛り残された下型２１０を、成形用上型１０４に押し上げ、成形用上型１０４の接面１０４２に下型２１０の接面２１０２を当接させて閉型する。そして、空間Ｓ１に開口部２１０１から飛び出た樹脂原料ＲＸを取り込んだ上で、図４−３に示すように、成形用上型１０４内の成形ピン１０４１を下方向にスライドして上記樹脂原料ＲＸを圧潰し、成形用上型１０４と下型２１０とによって形作られた型内空洞部ＣＴ２にて成形（整形）される。   Accordingly, as shown in FIG. 4B, the lower mold 210 on which the crushed molding resin lump RX is left is pushed up to the molding upper mold 104, and is lowered to the contact surface 1042 of the molding upper mold 104. The contact surface 2102 of the mold 210 is brought into contact with the mold 210 to close the mold. And after taking in the resin raw material RX which protruded from the opening part 2101 in space S1, as shown to FIGS. 4-3, the shaping | molding pin 1041 in the upper mold | type 104 for shaping | molding is slid downward, and the said resin raw material RX And is molded (shaped) by the in-mold cavity portion CT2 formed by the molding upper mold 104 and the lower mold 210.

（他の計量工程／計量工程の実施例２）
図５−１は本発明に係る成形方法においてその他の計量工程を示す概略断面図であり、同図は供給用上型３００と下型２１０が閉型し、供給用上型３００の供給路３０１と下型の開口部２１０１とで形成された空洞部ＣＴ３に、溶融された樹脂原料Ｒが充填された状態を示している。 (Other measurement process / Example 2 of measurement process)
FIG. 5A is a schematic cross-sectional view showing another measuring step in the molding method according to the present invention. In FIG. A state in which the melted resin material R is filled in the cavity portion CT3 formed by the lower mold opening 2101 is shown.

この実施形態では、前記実施形態とは異なり、図５−１に示すように、供給用上型３００が送給用ノズル１０２とは別個独立の上型として構成されている。すなわち、供給用上型３００は、図５−１に示すように、送給用ノズル１０２内に対して軸方向に上下スライドする状態で送給用ノズル１０２内に取り付けられた摺動部３０２と、この摺動部３０２に連続し閉型時に送給用ノズル１０２に当接するフランジ状の上型本体部３０３からなり、摺動部３０２から上型本体部３０３に至る供給用上型３００の内部に、閉型時、一方が前記送給用ノズル１０２の主部１０２２の送給路１０２３につながり、他方が下型２１０の開口部２１０１につながる供給路３０１を備えている。   In this embodiment, unlike the above-described embodiment, as shown in FIG. 5A, the upper mold 300 for supply is configured as an upper mold independent from the supply nozzle 102. That is, as shown in FIG. 5A, the supply upper mold 300 includes a sliding portion 302 attached in the feed nozzle 102 in a state of sliding up and down in the axial direction with respect to the feed nozzle 102. The upper mold body 303 is a flange-shaped upper part 303 that is continuous with the sliding part 302 and abuts against the feeding nozzle 102 when the mold is closed, and the inside of the upper mold 300 for supply from the sliding part 302 to the upper mold body 303. In addition, when the mold is closed, a supply path 301 is connected to one of the feed paths 1023 of the main portion 1022 of the feed nozzle 102 and the other to the opening 2101 of the lower mold 210.

従って、かかる供給用上型３００によれば、図５−１に示すように、この供給用上型３００に対して下型２１０を押し当てながら前記送給用ノズル１０２に供給用上型３００をスライドさせながら押し上げて閉型し、溶融された合成樹脂原料を供給用上型３００の前記供給路３０１から下型の型内の開口部２１０１に供給して、この供給用上型３００と下型２１０とにより閉型して構成された型内空洞部ＣＴ３に前記合成樹脂を充填する。   Therefore, according to the upper mold 300 for supply, as shown in FIG. 5A, the upper mold 300 for supply is attached to the feeding nozzle 102 while pressing the lower mold 210 against the upper mold 300 for supply. The molten synthetic resin material is pushed up while being slid to be closed, and the molten synthetic resin material is supplied from the supply path 301 of the upper mold 300 for supply to the opening 2101 in the lower mold, and the upper mold 300 and the lower mold are supplied. The synthetic resin is filled into the in-mold cavity portion CT <b> 3 which is configured to be closed by 210.

次に、図５−２に示すように、下型２１０を押し下げ、これに追随して供給用上型３００を送給用ノズル１０２からスライド降下させることにより、この供給路３０１に含まれる当該合成樹脂原料を引き伸ばし、所定量の樹脂塊ＲＸとなる部位Ｘにて引き千切られ、図５−３に示すように、下型２１０には所定量の樹脂塊ＲＸが盛り残される。   Next, as shown in FIG. 5B, the lower mold 210 is pushed down, and the upper mold 300 for supply is slid down from the feeding nozzle 102 in accordance with the lower mold 210, so that the synthesis included in the supply path 301 is performed. The resin raw material is stretched and cut off at a portion X that becomes a predetermined amount of resin lump RX, and a predetermined amount of resin lump RX remains on the lower mold 210 as shown in FIG.

この方法によれば、供給用上型３００が送給用ノズル１０２とは別個独立の上型として構成し、摺動部３０２を有する上型本体部３０３を上下スライドさせて合成樹脂原料を引き伸ばし引き千切ることから、その引き伸ばし乃至引き千切りがきわめて容易に達成される。なお、本実施形態では、前記実施形態と同じく、供給路３０１を第１供給路３０１０と第１供給路３０１０連続して下型の開口部２１０１側に向かって漸次その断面積が拡大する第２供給路３０１１とで構成しているが、本発明は前記実施形態と同様にこれに格別限定されない。   According to this method, the upper mold 300 for supply is configured as an upper mold independent of the feeding nozzle 102, and the upper mold main body 303 having the sliding portion 302 is vertically slid to stretch and pull the synthetic resin material. Since it is shredded, it can be very easily achieved. In the present embodiment, as in the above-described embodiment, the supply path 301 is continuously extended from the first supply path 3010 and the first supply path 3010 toward the lower mold opening 2101 side. Although comprised with the supply path 3011, this invention is not exceptionally limited to this similarly to the said embodiment.

本実施形態の場合も、前記実施形態と同様、前記溶融された合成樹脂原料Ｒの供給先の端部を引っ張るタイミングとして、その端部の内部が溶融状態を保持しつつ外側若しくは表面が固化する過程において引っ張るようにしている。
具体的には、下型２１０の開口部２１０１の内壁面の温度を、その開口部２１０１に充填される樹脂原料の融点未満の温度であって、その開口部２１０１に充填された樹脂原料の内部が溶融状態を保持しつつ外側若しくは表面が固化するように調整して、その固化する過程において引っ張るようにしている。
従って、下型２１０の開口部２１０１に充填された樹脂原料はその外側若しくは表面が固化過程にある一方で、供給用上型３００の供給路３０１に含まれる樹脂原料は、下型２１０の開口部２１０１に含まれる樹脂原料と比較して溶融状態又は溶融状態に近い状態にある。因って、開口部２１０１に含まれる樹脂原料と供給路３０１に含まれる樹脂原料とが相互に異なる相状態にあるため、供給用上型３００に対する下型２１０の下降がそのまま供給路１０３２に含まれる樹脂原料を引き伸す状態として実現し、更に下型２１０を下降させることによってその引き伸ばした部分が引き千切られることになる。 Also in the case of this embodiment, as in the above-described embodiment, as the timing for pulling the end of the melted synthetic resin raw material R, the outside or the surface solidifies while the inside of the end is kept in a molten state. I try to pull it in the process.
Specifically, the temperature of the inner wall surface of the opening 2101 of the lower mold 210 is a temperature lower than the melting point of the resin raw material filled in the opening 2101 and the inside of the resin raw material filled in the opening 2101 Is adjusted so that the outside or surface is solidified while maintaining a molten state, and is pulled in the solidification process.
Accordingly, the resin raw material filled in the opening 2101 of the lower mold 210 is solidified on the outside or the surface, while the resin raw material contained in the supply path 301 of the upper mold 300 for supply is the opening of the lower mold 210. Compared with the resin raw material included in 2101, it is in a molten state or a state close to a molten state. Therefore, since the resin raw material contained in the opening 2101 and the resin raw material contained in the supply path 301 are in different phases, the lowering of the lower mold 210 relative to the upper mold for supply 300 is included in the supply path 1032 as it is. The resin raw material to be stretched is realized, and the lower mold 210 is further lowered so that the stretched portion is shredded.

このようなことから、既述した実施形態と同様、供給用上型３００の供給路３０１は、前記合成樹脂原料の融点以上に設定されることが好ましく、下型２１０、特にその開口部２１０１の内壁面を前記合成樹脂原料の融点未満に設定することが好ましい。本発明において特に限定されるものではないが、例えば前記供給路３０１が前記合成樹脂原料の融点より１０℃〜２０℃より高い温度に設定され、下型が１０〜８０℃の範囲内に設定されていることが好ましい。   For this reason, as in the above-described embodiment, the supply path 301 of the supply upper mold 300 is preferably set to be equal to or higher than the melting point of the synthetic resin raw material, and the lower mold 210, particularly the opening 2101 thereof, is preferably set. It is preferable to set the inner wall surface below the melting point of the synthetic resin raw material. Although not particularly limited in the present invention, for example, the supply path 301 is set to a temperature higher than the melting point of the synthetic resin raw material by 10 ° C to 20 ° C, and the lower mold is set to a range of 10 to 80 ° C. It is preferable.

なお、この方法により計量された樹脂塊ＲＸは、前記実施形態と同様に、樹脂塊ＲＸが開口部２１０１に盛り残された下型２１０を、圧潰ステーションに回転移動させ、前記と同様に、この下型２１０を成形用上型に押し上げて閉型し、圧潰して所定形状に成形するものである。   The resin lump RX weighed by this method is moved to the crushing station by rotating the lower mold 210 where the resin lump RX is left in the opening 2101 as in the above embodiment. The lower mold 210 is pushed up to the molding upper mold, closed, and crushed to be molded into a predetermined shape.

（他の計量工程／計量工程の実施例３）
図６−１は本発明に係る成形方法においてその他の計量工程を示す概略断面図であり、同図は前記計量工程１で用いられた供給用上型１０２と下型４００が閉型し、成形用上型１０２の供給路１０３２と下型４００の開口部４０１とで形成された空洞部ＣＴ４に、溶融された樹脂原料Ｒが充填された状態を示している。なお、送給用ノズル１０２及びその先端部１０２１を構成する供給用上型１０２に関し、符号は前記図３−１〜図３−５に示すものと同じ部位を示している。 ( Example 3 of other measurement process / measurement process)
FIG. 6A is a schematic cross-sectional view showing another weighing process in the molding method according to the present invention, in which the upper mold 102 for supply and the lower mold 400 used in the weighing process 1 are closed and molded. A state in which a melted resin raw material R is filled in a cavity portion CT4 formed by the supply path 1032 of the upper mold 102 and the opening 401 of the lower mold 400 is shown. In addition, regarding the upper nozzle 102 for supply which comprises the nozzle 102 for supply and its front-end | tip part 1021, the code | symbol has shown the same site | part as shown to the said FIGS.

この方法では、下型４００が、当該下型４００の開口部４０１に連通する摺動孔４０２とこの摺動孔４０２内を上下摺接可動するピン４０３を備えている。
従って、図６−２に示すように、前記下型４００の押し下げに同期して前記ピン４０２を引き下げ、盛り残すべき原料樹脂ＲＸ‘と下型４００のピン４０２との間に生じた空間Ｓ２による負圧により前記原料樹脂ＲＸ’を保持しながら、前記供給路１０３２に含まれる当該合成樹脂原料Ｒを引き伸ばし、所定量の成形用樹脂塊ＲＸとなる部位Ｘにて引き千切るものである。 In this method, the lower mold 400 includes a sliding hole 402 that communicates with the opening 401 of the lower mold 400 and a pin 403 that can slide in the sliding hole 402 up and down.
Accordingly, as shown in FIG. 6B, the pin 402 is pulled down in synchronization with the lower mold 400 being pushed down, and the space S2 generated between the raw material resin RX ′ to be left and the pin 402 of the lower mold 400 is left. The synthetic resin raw material R contained in the supply path 1032 is stretched while holding the raw material resin RX ′ by negative pressure, and is shredded at a site X that becomes a predetermined amount of molding resin lump RX.

（他の計量工程／計量工程の参考例）
図７−１〜図７−３はそれぞれ、その他の計量工程の各過程を順次示す概略断面図である。
本方法によれば、図７−１に示すように、押出し機１００により押し出されて送給用ノズル１０２の先端部１０２１から供給される溶融状態の樹脂原料Ｒを、図７−２に示すようにカッター５００により切断し、図７−３に示すように、これを下型２１０の開口部２１０１に投入し、この下型の開口部２１０１に投入された樹脂塊ＲＸＷを圧潰して、下型の開口部２１０１と成形用上型（図示せず）によって形成される空洞部に押し広げて成形される。 (Other measurement processes / reference examples of measurement processes)
Figure 7-1 Figure 7-3 respectively are a schematic cross-sectional views sequentially showing each step of another measuring step of that.
According to this method, as shown in FIG. 7-1, the molten resin material R extruded from the extruder 100 and supplied from the tip 1021 of the feeding nozzle 102 is shown in FIG. 7-2. 7-3, and as shown in FIG. 7-3, this is put into the opening 2101 of the lower mold 210, and the resin lump RXW put into the opening 2101 of the lower mold is crushed to lower the lower mold Are formed in a hollow portion formed by an opening 2101 and an upper mold (not shown).

この方法において、溶融状態の樹脂原料Ｒの計量は、押出し機１００による樹脂の押し出し速度とカッター５００の駆動タクトで規定される量でなされる。   In this method, the molten resin raw material R is measured by an amount defined by the resin extrusion speed of the extruder 100 and the drive tact of the cutter 500.

本発明の成形方法は、医療用キャップの製造工程の一つの工程として組み込むことも可能である。すなわち、医療用キャップが医療用栓体とこれを保持する外枠体からなるものである場合、本発明の方法にて医療用栓体成形後、続けて合成樹脂製のキャップの外枠体を射出成形ないしはコンプレッション成形にて成形し、前記栓体と前記外枠体を一体成形することができる。また逆に、外枠体成形後、本発明の方法で、栓体を成形して、一体成形することも可能である。また、本発明の方法で医療用栓体を成形し、これと別個に外枠体を成形し、前記栓体を前記外枠体に嵌め込んで医療用キャップとすることもできる。   The molding method of the present invention can also be incorporated as one step in the manufacturing process of a medical cap. That is, when the medical cap is composed of a medical stopper and an outer frame holding the medical stopper, after the medical stopper is molded by the method of the present invention, the outer frame of the synthetic resin cap is subsequently The plug body and the outer frame body can be integrally formed by injection molding or compression molding. Conversely, after the outer frame body is molded, the plug body can be molded and integrally molded by the method of the present invention. In addition, a medical plug body can be formed by the method of the present invention, an outer frame body can be formed separately from this, and the plug body can be fitted into the outer frame body to form a medical cap.

（原料組成物）
本発明に用いる樹脂原料は格別限定されない。本成形方法に適用できる合成樹脂であれば問題ない。例えばポリエチレン、ポリプロピレン、ポリブテン、ポリイソプレン、ポレペンテン、エチレン−酢酸ビニル共重合体、エチレン−アクリル酸エチルなどのポリオレフィン系樹脂のほか、ポリ塩化ビニル、ポリスチレン、ポリ乳酸、アクリル樹脂、メタクリル樹脂、ポリアミド、ポリアセタール、ポリカーボネート、熱可塑性ポリエステル樹脂、フッ素樹脂、熱可塑性ポリエーテル樹脂、熱可塑性エラストマーなど、各種のポリマーを用いることができる。
特に、熱可塑性エラストマー又はその組成物は、一定の粘弾性を有しているため、前記計量段階での樹脂の切断や引き伸ばしに適しており、本発明の成形方法として最適である。例えば、一般的に熱可塑性エラストマー樹脂組成物と称されるものであり、ブロック共重合体にパラフィンオイルとオレフィン系重合体が含まれたものである。ブロック共重合体の種類によって熱可塑性エラストマー樹脂組成物の基本性能は決定される。本発明に用いる熱可塑性エラストマー組成物のブロック共重合体の具体例としては、スチレン系、オレフィン系、塩化ビニル系、ウレタン系、ポリエステル系、ポリアミド系などのブロック共重合体を挙げることができる。なかでもスチレン系のブロック共重合体であって、ビニル芳香族化合物と共役ジエン化合物からなるブロック共重合体に水素添加したＳＥＢＳ（スチレンエチレンブチレンスチレンブロック共重合体）やＳＢＰＳ（スチレンエチレンプロピレンスチレンブロック共重合体はゴム特性に優れ、本成形方法にも向いているので好ましい。 (Raw material composition)
The resin raw material used in the present invention is not particularly limited. There is no problem as long as it is a synthetic resin applicable to this molding method. For example, in addition to polyolefin resins such as polyethylene, polypropylene, polybutene, polyisoprene, polypentene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate, polyvinyl chloride, polystyrene, polylactic acid, acrylic resin, methacrylic resin, polyamide, Various polymers such as polyacetal, polycarbonate, thermoplastic polyester resin, fluororesin, thermoplastic polyether resin, and thermoplastic elastomer can be used.
In particular, a thermoplastic elastomer or a composition thereof has a certain viscoelasticity, and is therefore suitable for cutting and stretching a resin at the measurement stage, and is optimal as a molding method of the present invention. For example, it is generally called a thermoplastic elastomer resin composition, and a block copolymer contains paraffin oil and an olefin polymer. The basic performance of the thermoplastic elastomer resin composition is determined by the type of block copolymer. Specific examples of the block copolymer of the thermoplastic elastomer composition used in the present invention include styrene-based, olefin-based, vinyl chloride-based, urethane-based, polyester-based, and polyamide-based block copolymers. Among them, SEBS (styrene ethylene butylene styrene block copolymer) and SBPS (styrene ethylene propylene styrene block), which are hydrogenated block copolymers composed of vinyl aromatic compounds and conjugated diene compounds, are styrene block copolymers. A copolymer is preferable because it has excellent rubber properties and is suitable for the present molding method.

また、本発明の製造方法で得られる医療用栓体の厚みは通常１ｍｍ以上、好ましくは２〜１０ｍｍの厚肉の成形品である。   Moreover, the thickness of the medical plug obtained by the production method of the present invention is usually a thick molded product of 1 mm or more, preferably 2 to 10 mm.

本発明の成形方法は、各種合成樹脂成形品の成形方法に利用することができる。特に、医療分野において輸液容器或いは輸液キャップ用の針刺し可能な栓体として好適に用いられる熱可塑性エラストマー樹脂成形品の成形方法に適している。   The molding method of the present invention can be used for molding various synthetic resin molded products. In particular, it is suitable for a method for molding a thermoplastic elastomer resin molded article that is suitably used as a needle-sealable stopper for an infusion container or an infusion cap in the medical field.

本発明の方法を実施するためのコンプレッション成形装置の一例を示す概略平面図である。It is a schematic plan view which shows an example of the compression molding apparatus for enforcing the method of this invention. 図１における概略側図である。It is a schematic side view in FIG. 本実施形態における計量工程の開始過程を示す樹脂原料の送給用ノズルと下型との概略断面図である。It is a schematic sectional drawing of the nozzle for resin raw material feeding which shows the starting process of the measurement process in this embodiment, and a lower mold | type. 同型閉過程を示す樹脂原料の送給用ノズルと下型との概略断面図である。It is a schematic sectional drawing of the nozzle for supply of the resin raw material which shows the same mold closing process, and a lower mold | type. 同樹脂の充填過程を示す樹脂原料の送給用ノズルと下型との概略断面図である。It is a schematic sectional drawing of the nozzle for resin raw material and the lower mold | type which show the filling process of the resin. 同引き千切り開始過程を示す樹脂原料の送給用ノズルと下型との概略断面図である。It is a schematic sectional drawing of the nozzle for supply of the resin raw material and the lower mold | type which show the pulling and shredding start process. 同計量完了過程を示す樹脂原料の送給用ノズルと下型との概略断面図である。It is a schematic sectional drawing of the nozzle for resin raw material feeding and the lower mold | type which show the measurement completion process. 本実施形態における圧潰工程（成形工程）の開始過程を示す成形用上型と下型との概略断面図である。It is a schematic sectional drawing of the shaping | molding upper mold | type and lower mold | type which shows the start process of the crushing process (molding process) in this embodiment. 同閉型過程を示す成形用上型と下型との概略断面図である。It is a schematic sectional drawing of the shaping | molding upper mold | type and lower mold | type which shows the same closed mold process. 同成形過程を示す成形用上型と下型との概略断面図である。FIG. 3 is a schematic cross-sectional view of an upper mold for molding and a lower mold showing the molding process. 本発明に係る第２の態様の計量工程において供給用上型と下型内に樹脂が充填された状態を示す概略断面図である。It is a schematic sectional drawing which shows the state with which resin was filled in the upper mold | type for supply, and the lower mold | type in the measurement process of the 2nd aspect which concerns on this invention. 同樹脂の引き千切り過程を示す供給用上型と下型との概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply and the lower mold | type which shows the process of shredding the resin. 同樹脂の引き千切られた状態を示す供給用上型と下型との概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply and the lower mold | type which show the state where the resin was shredded. 本発明に係る第３の態様の計量工程において供給用上型と下型内に樹脂が充填された状態を示す概略断面図である。It is a schematic sectional drawing which shows the state with which resin was filled in the upper mold | type for supply, and the lower mold | type in the measurement process of the 3rd aspect which concerns on this invention. 同樹脂の引き千切り過程を示す供給用上型と下型との概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply and the lower mold | type which shows the process of shredding the resin. 同樹脂の引き千切られた状態を示す供給用上型と下型との概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply and the lower mold | type which show the state where the resin was shredded. 本発明に係る第４の態様の計量工程においてカッターによる原料樹脂の切断過程を示す供給用上型と下型の概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply and a lower mold | type which shows the cutting process of raw material resin by a cutter in the measurement process of the 4th aspect which concerns on this invention. 同切断された原料樹脂の下型への落下状態を示す供給用上型と下型の概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply which shows the fall state to the lower mold | type of the cut | disconnected raw material resin, and a lower mold | type. 同下型内に原料樹脂が投入された状態を示す供給用上型と下型の概略断面図である。It is a schematic sectional drawing of the upper mold | type for supply and the lower mold | type which shows the state by which raw material resin was injected | thrown-in in the same lower mold | type.

符号の説明Explanation of symbols

１００ 押し出し機
１０１ ホッパー
１０２ 送給用ノズル
１０２１ 先端部
１０２２ 主部
１０２３ 供給路
１０３ 供給用上型
１０３１ 上型本体部
１０３２ 送給路
１０４ 成形用上型
２００ 成形機
２０１ 成形テーブル
２０２ 計量ステーション
２０３ 圧潰ステーション
２１０ 下型
２１０１ 開口部
３００ 供給用上型
３０１ 供給路
４００ 下型
４０１ 開口部
４０２ 摺動孔
４０３ ピン
５００ カッター
ＲＸ 成形用樹脂塊
Ｒ 樹脂原料

DESCRIPTION OF SYMBOLS 100 Extruder 101 Hopper 102 Feed nozzle 1021 Tip part 1022 Main part 1023 Supply path 103 Supply upper mold 1031 Upper mold main body part 1032 Supply path 104 Molding upper mold 200 Molding machine 201 Molding table 202 Measuring station 203 Crushing station 210 Lower mold 2101 Opening 300 Upper mold for supply 301 Supply path 400 Lower mold 401 Opening 402 Slide hole 403 Pin 500 Cutter RX Molding resin mass R Resin raw material

Claims (16)

供給路から溶融された合成樹脂原料が金型内に所定量充填された後、前記供給路に含まれる溶融された合成樹脂原料を引き伸ばし、その引き伸ばした部分を引き千切り、その引き千切られた樹脂塊を成形する合成樹脂成形品の成形方法。After a predetermined amount of the synthetic resin raw material melted from the supply path is filled in the mold, the molten synthetic resin raw material contained in the supply path is stretched, the stretched portion is shredded, and the shredded resin A molding method of a synthetic resin molded product for molding a lump. 供給路から溶融された合成樹脂原料が金型内に所定量充填された後、前記供給路に含まれる溶融された合成樹脂原料の供給先の端部を、その内部が溶融状態を保持しつつ外側若しくは表面が固化する過程において引っ張り、前記溶融された合成樹脂原料の供給途中を引き伸ばし、その引き伸ばした部分を引き千切り、その引き千切られた樹脂塊を成形する合成樹脂成形品の成形方法。After a predetermined amount of the synthetic resin raw material melted from the supply path is filled in the mold, the end of the supply destination of the molten synthetic resin raw material contained in the supply path is maintained in a molten state. A method for forming a synthetic resin molded product, wherein the outer or surface is solidified and stretched during the supply of the molten synthetic resin raw material, the stretched portion is shredded, and the shredded resin mass is molded. 溶融された合成樹脂原料を、供給路を通じて下型の型内に供給し、当該下型への供給路においてその供給路に含まれる当該合成樹脂原料を所定量の成形用樹脂塊となる部位にて引き千切り、この引き千切られて前記下型に盛り残された成形用樹脂塊を、成形用上型により圧潰して成形することを特徴とする合成樹脂成形品の成形方法。The melted synthetic resin raw material is supplied into the lower mold through the supply path, and the synthetic resin raw material contained in the supply path in the supply path to the lower mold is supplied to a portion that becomes a predetermined amount of molding resin lump. A molding method for a synthetic resin molded article, wherein the molding resin lump that has been shredded and left in the lower mold is crushed and molded by the upper mold. 前記供給路が前記合成樹脂原料の供給用上型に備えられており、溶融された合成樹脂原料をこの供給用上型の供給路を通じて下型の型内に供給して、この供給用上型と下型とにより構成された型内空洞部に前記合成樹脂を充填した後、前記供給路においてその供給路に含まれる当該合成樹脂原料を所定量の成形用樹脂塊となる部位にて引き千切り、この引き千切られて前記下型に盛り残された成形用樹脂塊を、成形用上型により圧潰して成形する請求項３記載の合成樹脂成形品の成形方法。The supply path is provided in the upper mold for supplying the synthetic resin raw material, and the molten synthetic resin raw material is supplied into the lower mold through the supply path of the upper mold for supply. After the synthetic resin is filled in the mold cavity formed by the lower mold and the lower mold, the synthetic resin raw material contained in the supply path in the supply path is shredded at a portion that becomes a predetermined amount of molding resin lump. 4. The method for molding a synthetic resin molded article according to claim 3, wherein the molding resin lump that has been shredded and left in the lower mold is crushed by an upper mold for molding. 前記合成樹脂原料が、オレフィン系樹脂原料である請求項１乃至４のいずれかの項に記載の合成樹脂成形品の成形方法。The method for molding a synthetic resin molded article according to any one of claims 1 to 4, wherein the synthetic resin raw material is an olefin resin raw material. 前記合成樹脂原料が、熱可塑性エラストマー樹脂原料である請求項１乃至４のいずれかの項に記載の合成樹脂成形品の成形方法。The method for molding a synthetic resin molded product according to any one of claims 1 to 4, wherein the synthetic resin material is a thermoplastic elastomer resin material. 前記引き千切りが、前記下型を前記供給路から離反移動させてなされる請求項３乃至６のいずれかの項に記載の合成樹脂成形品の成形方法。The method for molding a synthetic resin molded product according to any one of claims 3 to 6, wherein the pulling and cutting is performed by moving the lower mold away from the supply path. 前記供給路が、前記合成樹脂原料の融点以上に設定され、下型が前記合成樹脂原料の融点未満に設定されている請求項１乃至４のいずれかの項に記載の合成樹脂成形品の成形方法。The molding of the synthetic resin molded product according to any one of claims 1 to 4, wherein the supply path is set to be equal to or higher than the melting point of the synthetic resin raw material, and the lower mold is set to be lower than the melting point of the synthetic resin raw material. Method. 前記供給路が前記合成樹脂原料の融点より１０℃〜２０℃高い温度に設定され、下型が１０〜８０℃に設定されている請求項８記載の合成樹脂成形品の成形方法。The method for molding a synthetic resin molded product according to claim 8, wherein the supply path is set to a temperature 10 to 20 ° C higher than the melting point of the synthetic resin raw material, and the lower mold is set to 10 to 80 ° C. 前記供給用上型が、前記合成樹脂原料の送給用ノズルの先端部にて構成され且つ下型を閉型する上型本体部を備えており、当該上型本体部の内部に、当該送給用ノズル主部の送給路から連続する下型への供給路を備えた請求項４記載の合成樹脂成形品の成形方法。The upper mold for supply includes an upper mold main body configured by a tip portion of the synthetic resin raw material supply nozzle and closes the lower mold, and the upper mold main body includes the upper mold main body. The method for molding a synthetic resin molded product according to claim 4, further comprising a supply path from the supply path of the main portion of the supply nozzle to the continuous lower mold. 前記供給用上型が、前記合成樹脂原料の送給用ノズルの先端部に対して可動式に分割されており、当該先端部に対して上下スライド可能に内装される摺動部と、この摺動部に連続して下型を閉型する上型本体部とを備えており、当該摺動部と本体部の内部に前記送給用ノズル主部の送給路につながる下型への供給路が構成されている請求項４記載の合成樹脂成形品の成形方法。The upper mold for supply is movably divided with respect to the tip of the nozzle for feeding the synthetic resin raw material, and a sliding part that is slidable up and down with respect to the tip is provided. An upper mold main body part that continuously closes the lower mold to the moving part, and supplies the lower mold connected to the feeding path of the main part of the feeding nozzle inside the sliding part and the main body part The method for molding a synthetic resin molded product according to claim 4, wherein a path is formed. 前記下型への供給路が、前記送給用ノズル主部の送給路につながる第１供給路と、この第１供給路に連続して下型の開口部側に向かって漸次その断面積が拡大する第２供給路を有する請求項１０又は１１記載の合成樹脂成形品の成形方法。The supply path to the lower mold is a first supply path connected to the supply path of the main part of the nozzle for supply, and the cross-sectional area is gradually increased toward the opening of the lower mold continuously to the first supply path. The molding method of the synthetic resin molded product according to claim 10 or 11, which has a second supply path that expands. 溶融された合成樹脂原料の送給用ノズルの先端部を構成し且つ下型を閉型する上型本体部を備えており、当該上型本体部の内部に、当該送給用ノズル主部の送給路から連続する下型への供給路を備えた供給用上型であって、An upper mold main body that forms the tip of the molten synthetic resin raw material feed nozzle and closes the lower mold is provided. Inside the upper mold main body, the main part of the feed nozzle is provided. An upper mold for supply provided with a supply path from the supply path to the continuous lower mold,
この供給用上型に対して下型を押し当てながら閉型し、溶融された合成樹脂原料を供給用上型の前記供給路を通じて下型の開口部に供給して、この供給用上型と下型とにより閉型されて構成された型内空洞部に前記合成樹脂を充填し、The lower mold is closed while pressing the lower mold against the upper mold for supply, and the molten synthetic resin raw material is supplied to the opening of the lower mold through the supply path of the upper mold for supply. Filling the cavity inside the mold that is closed by the lower mold with the synthetic resin,
その後、下型を押し下げ、前記供給路に含まれる当該合成樹脂原料を引き伸ばし、所定量の成形用樹脂塊となる部位にて引き千切り、Thereafter, the lower mold is pushed down, the synthetic resin raw material contained in the supply path is stretched, and is shredded at a site that becomes a predetermined amount of molding resin lump,
この引き千切られた成形用樹脂塊が盛り残された下型を、成形用上型に押し上げて閉型し、圧潰して成形することを特徴とする請求項１０記載の合成樹脂成形品の成形方法。11. The molding of a synthetic resin molded product according to claim 10, wherein the lower mold in which the crushed molding resin lump is left is pushed up onto the molding upper mold, closed, and crushed for molding. Method. 前記下型が、当該下型の開口部に連通する摺動孔とこの摺動孔内を摺接可動するピンを備えた下型であって、The lower mold is a lower mold provided with a sliding hole communicating with the opening of the lower mold and a pin slidably movable in the sliding hole,
前記下型の押し下げに同期して前記ピンを引き下げ、盛り残すべき原料樹脂と下型の間に生じた負圧により前記原料樹脂を保持しながら、前記供給路に含まれる当該合成樹脂原料を引き伸ばし、所定量の成形用樹脂塊となる部位にて引き千切る請求項１３記載の合成樹脂成形品の成形方法。The pin is pulled down in synchronization with the lower mold being pushed down, and the synthetic resin material contained in the supply path is stretched while holding the raw material resin by the negative pressure generated between the raw material resin to be left and the lower mold. 14. The method for molding a synthetic resin molded product according to claim 13, wherein the molding is torn off at a site that becomes a predetermined amount of molding resin lump. 溶融された合成樹脂原料の送給用ノズルに対して上下スライド可能に取り付けられ、前記送給用ノズル主部の送給路につながる下型への供給路を備えた合成樹脂原料の供給用上型であって、A synthetic resin raw material supply upper part that is slidably attached to a molten synthetic resin raw material supply nozzle and has a supply path to a lower mold that leads to a supply path of the main part of the supply nozzle. Type,
この供給用上型に対して下型を押し当てながら前記送給用ノズルに供給用上型をスライドさせながら押し上げて閉型し、溶融された合成樹脂原料を供給用上型の前記供給路から下型の型内に供給して、この供給用上型と下型とにより閉型されて構成された型内空洞部に前記合成樹脂を充填し、While pressing the lower mold against the upper mold for supply, the upper mold for supply is pushed up and closed while sliding on the feeding nozzle, and the molten synthetic resin raw material is removed from the supply path of the upper mold for supply. Supplying into the lower mold, filling the synthetic resin into the mold cavity that is closed by the upper mold and lower mold for supply,
その後、下型を押し下げ、これに追随して供給用上型を送給用ノズルからスライド降下させることにより、この供給路に含まれる当該合成樹脂原料を引き伸ばし、所定量の成形用樹脂塊となる部位にて引き千切り、Thereafter, the lower mold is pushed down, and the upper mold for supply is slid down from the feed nozzle by following this, so that the synthetic resin raw material contained in this supply path is stretched to form a predetermined amount of molding resin lump. Shred at the site,
この引き千切られた成形用樹脂塊が盛り残された下型を、成形用上型に押し上げて閉型し、圧潰して成形することを特徴とする請求項１１記載の合成樹脂成形品の成形方法。12. The molding of a synthetic resin molded product according to claim 11, wherein the lower mold in which the crushed molding resin lump is left is pushed up onto the molding upper mold, closed, and crushed for molding. Method. 前記合成樹脂成形品が医療用栓体である請求項１〜１５のいずれかの項に記載の合成樹脂成形品の成形方法。The method for molding a synthetic resin molded product according to any one of claims 1 to 15, wherein the synthetic resin molded product is a medical plug.
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